The inbred,weirdo,mountainmen type killers in Hell Night, Just Before Dawn & Wrong Turn are very imposing as well.I also like some of Leatherface's family members throughout the TCM seriesthe Hitchhiker,the Cook,Grandpa,Cho-Top,Tex,Alfredo & Tinker

There are so many others..I'll just leave it at that and let someone else fill in the blanks.